Limits to coherent scattering and photon coalescence from solid-state quantum emitters

J. Iles-Smith, D.P.S. McCutcheon, J. Mørk, A. Nazir

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The desire to produce high-quality single photons for applications in quantum information science has lead to renewed interest in exploring solid-state emitters in the weak excitation regime. Under these conditions it is expected that photons are coherently scattered, and so benefit from a substantial suppression of detrimental interactions between the source and its surrounding environment. Nevertheless, we demonstrate here that this reasoning is incomplete, as phonon interactions continue to play a crucial role in determining solid-state emission characteristics even for very weak excitation. We find that the sideband resulting from non-Markovian relaxation of the phonon environment is excitation strength independent. It thus leads to an intrinsic limit to the fraction of coherently scattered light and to the visibility of two-photon coalescence at weak driving, both of which are absent for atomic systems or within simpler Markovian treatments.
Original languageEnglish
Article number201305(R)
JournalPhysical Review B
Issue number20
Early online date25 May 2017
Publication statusPublished - 2017


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